309454 has 4 divisors (see below), whose sum is σ = 464184. Its totient is φ = 154726.

The previous prime is 309437. The next prime is 309457. The reversal of 309454 is 454903.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 454903 = 17 ⋅26759.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (309457) by changing a digit.

309454 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77362 + ... + 77365.

It is an arithmetic number, because the mean of its divisors is an integer number (116046).

2³⁰⁹⁴⁵⁴ is an apocalyptic number.

309454 is a deficient number, since it is larger than the sum of its proper divisors (154730).

309454 is a wasteful number, since it uses less digits than its factorization.

309454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154729.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 309454 is about 556.2858977181. The cubic root of 309454 is about 67.6392370511.

The spelling of 309454 in words is "three hundred nine thousand, four hundred fifty-four".